Textbook-Integrated Guide to Educational Resources

TIGER

Fog Machines, Vapors, and Phase DiagramsEd VitzThis series of demonstrations elucidate the operation of commercial fog machines using common laboratory materials and can be adapted for elementary through tertiary levels. The formation of fogs is discussed in terms of the phase diagram for water and other chemical principles.Vitz, Ed. J. Chem. Educ.2008, 85, 1385.

Enthalpy of Vaporization and Vapor Pressures: An Inexpensive ApparatusRubin Battino, David A. Dolson, Michael R. Hall, and Trevor M. LetcherDescribes an inexpensive apparatus for the determination of the vapor pressure of a liquid as a function of temperature for the purpose of calculating enthalpy changes of vaporization. Also described are a simple air thermostat and an inexpensive temperature controller based on an integrated temperature sensor.Battino, Rubin; Dolson, David A.; Hall, Michael R.; Letcher, Trevor M. J. Chem. Educ.2007, 84, 822.

Popping Popcorn Kernels: Expanding Relevance with Linear ThinkingJordan L. Bennett, Michael M. Fuson, and Thomas A. EvansGraphing skills and an understanding of linear relationships are developed in the context of popping of individual popcorn kernels. Introductory-level chemistry students determine mass changes as the result of popping along with the volume and density of the popcorn flakes produced.Bennett, Jordan L.; Fuson, Michael M.; Evans, Thomas A. J. Chem. Educ.2006, 83, 414.

Carbohydrates |

Food Science |

Phases / Phase Transitions / Diagrams |

Physical Properties

Chemistry of Moth RepellentsGabriel PintoA real-life example consisting of the study of the different substances used as moth repellents is presented to introduce students to miscellaneous topics such as sublimation, intermolecular forces, insecticides, and the effect of moths on clothes. A set of questions about the most common moth repellents, well known to students, is used to motivate them to understand several everday phenomena through chemistry concepts. Pinto, Gabriel. J. Chem. Educ.2005, 82, 1321.

Noncovalent Interactions |

Applications of Chemistry |

Phases / Phase Transitions / Diagrams |

Solids |

Physical Properties |

Consumer Chemistry

Some Insights Regarding a Popular Introductory Gas Law ExperimentEd DePierro and Fred GarafaloThis paper alerts readers to a potential source of error in one approach to the Dumas method as it is often practiced in introductory chemistry laboratories. The room-temperature vapor pressures of volatile compounds that might be considered as unknowns for the experiment lead to determined molar masses that are too low. The greater the vapor pressure of the compound, the lower the determined molar mass will be, when compared to the accepted value. DePierro, Ed; Garafalo, Fred. J. Chem. Educ.2005, 82, 1194.

Crystals Out of "Thin Air"John J. VollmerIn this experiment crystals of para-dichlorobenzene form readily and efficiently from mothballs in a safe setting, using canning jars with ice cubes. The experiment can serve as an introduction to the concept of molecules, especially when combined with the condensation of liquids and the perception of odors. Vollmer, John J. J. Chem. Educ.2000, 77, 486.

Teaching Distillation Knowledge: A Video Film about Distillation Bridging a Gap Between Theory and PracticeMartin J. Goedhart, Hanno van Keulen, Theo M. Mulder, Adri H. Verdonk, and Wobbe De VosThe authors observed that first year students hardly used their knowledge of phase theory in the design and performance of distillations. They therefore developed a video in which they confront students with the boiling properties of liquid mixtures.Goedhart, Martin J.; van Keulen, Hanno; Mulder, Theo M.; Verdonk, Adri H.; De Vos, Wobbe. J. Chem. Educ.1998, 75, 378.

Vapor pressure demonstrations using a butane lighterDelumyea, R. DelThe concept of the change of state of matter and particularly the volatitlity of liquids is an important concept taught in introductory chemistry courses.Delumyea, R. Del J. Chem. Educ.1992, 69, 321.

Molecular association and structure of hydrogen peroxideGigure, Paul A.The typical textbook treatment of molecular association and structure of hydrogen peroxide, and the implications of these concepts for the physical properties of hydrogen peroxide tend to be oversimplified and inaccurate.Gigure, Paul A. J. Chem. Educ.1983, 60, 399.